JOURNALIST: One of those responsible is an Australian citizen. How serious is the Australian Government about assisting the US in efforts to prosecute him'

KEVIN RUDD: We are deadly serious about this. As I said this is a challenge not just for the United States but the US allies, friends and other countries around the world, other partners with whom we work diplomatically, including in the Arab world and the Muslim world on complex and sensitive questions.

So the Australian Government will do all within its power within the remit of Australian laws to deal with those responsible. The Australian Attorney General's already made a comprehensive statement to that effect.